It shows how to run a motor using one pin on the Arduino. An Arduino Uno or Nano can easily handle 5 pumps separately this way.

To run bigger motors, you would need to use a transistor with higher ratings, or a relay. And in either case you can use a separate power source to run the motors. Arduino has 5 volts available, but you could hook the motor up to a 12 volt source, for example (hook the grounds together).

Cheers,

-Nico

ps, I have no affiliation with Oomlout. I mention Oomlout a lot in these forums, but that's because they have a great tutorial that is open source and freely available and very easy to understand

I live out where we don't have city water and rely on a cistern for our water supply. I am looking at using an arduino and an ultrasonic sensor to keep track of our water level/usage. I have no programming or electronics background at all....but have started to catch on to the arduino. Just curious if you have heard of any similar projects? I have found a good sketch to give me a reliable meausurement but would like to send a daily email to myself and my wife. I am struggling with that side of it. Any help would be greatly appreciated. Thanks.

I am interested in picking up an Arduino board for a specific project but I would first like to know if it can be done with Arduino. What I would like to build is a Binery Coded Decimal Clock. Is this possible with Arduino and if so, where would I look for instructions on how to do this?

I am completely new to arduino. I am looking into writing a script that will vary the speed and frequency modulation of a micro vibrating motor. The coin motor and the arduino will be placed into a small object with sensors to activate the modulations. Do you know which arduino will be the correct one? Do they all work the same way? I am leaning towards a nano, but am not sure what i would need to connect it to my computer for configuration and sketching. Also, this may be a silly question, what is the difference between an arduino and and the PIC10F200 microchip. I read on another thread that this chip can be used to drive a vibrating motor. Ive looked into it and as well cant see how one might configure it, it being so small. At the end of the day, i just need to know which arduino is the smallest, which will require the smallest battery to run (3volts), and what components i will need to buy in order to drive a vibrating motor with sensors to activate the haptic signal.

I ve seen the site and read a bit on the various Arduinos. however, I still dont know if they all function the same way. It seems as tho the LilyPad has no port to connect to a computer by usb like the larger arduinos. Would i need an extra external port to connect it. Alos, will the Lilypad run with a simple 3 volt lithium disc battery?...

I can show you how to do that with 1 microprocessor and using 12 8 i/o pins if using zenercurrent limiting diodes to limit current into and out of the control pin.

Nico: will that work? Might have to use two control pins if CLDs will not be happy in parallel (and working cathodes and anodes hetero-paired) but, I think they will, since the ones I found allow 20 volt peak reverse(max.).

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